EP0822110B1 - Kraftstoffeinfüllstutzen-Modul für Kraftfahrzeug - Google Patents

Kraftstoffeinfüllstutzen-Modul für Kraftfahrzeug Download PDF

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Publication number
EP0822110B1
EP0822110B1 EP19970112998 EP97112998A EP0822110B1 EP 0822110 B1 EP0822110 B1 EP 0822110B1 EP 19970112998 EP19970112998 EP 19970112998 EP 97112998 A EP97112998 A EP 97112998A EP 0822110 B1 EP0822110 B1 EP 0822110B1
Authority
EP
European Patent Office
Prior art keywords
unit according
tank
fuel
pipe
inlet pipe
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP19970112998
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English (en)
French (fr)
Other versions
EP0822110A3 (de
EP0822110A2 (de
Inventor
Francesco Cimminelli
Eugenio Siviero
Giulio Castagneri
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ERGOM HOLDING SpA
Original Assignee
ERGOM HOLDING SpA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ERGOM HOLDING SpA filed Critical ERGOM HOLDING SpA
Publication of EP0822110A2 publication Critical patent/EP0822110A2/de
Publication of EP0822110A3 publication Critical patent/EP0822110A3/de
Application granted granted Critical
Publication of EP0822110B1 publication Critical patent/EP0822110B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60KARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K15/00Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
    • B60K15/03Fuel tanks
    • B60K15/035Fuel tanks characterised by venting means
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60KARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K15/00Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
    • B60K15/03Fuel tanks
    • B60K15/035Fuel tanks characterised by venting means
    • B60K15/03504Fuel tanks characterised by venting means adapted to avoid loss of fuel or fuel vapour, e.g. with vapour recovery systems
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60KARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K15/00Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
    • B60K15/03Fuel tanks
    • B60K15/04Tank inlets
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00Fluid handling
    • Y10T137/8593Systems
    • Y10T137/86292System with plural openings, one a gas vent or access opening
    • Y10T137/86324Tank with gas vent and inlet or outlet
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00Fluid handling
    • Y10T137/8593Systems
    • Y10T137/86292System with plural openings, one a gas vent or access opening
    • Y10T137/86324Tank with gas vent and inlet or outlet
    • Y10T137/86332Vent and inlet or outlet in unitary mounting

Definitions

  • the present invention relates generally to fuel supply systems for motor vehicles.
  • the invention concerns a filler pipe unit for the fuel tank of a motor vehicle, including a substantially rigid fuel inlet pipe having a first end attachable to the motor vehicle body and a second end for connection to the fuel tank, and a vent pipe integral with the fuel inlet pipe and joined thereto between the said first and second ends, and intended also to be connected to the fuel tank.
  • EP 0 636 505 A shows such a filler pipe unit according to the preamble of claim 1.
  • Known filler pipe units of the kind described above have the advantage that they facilitate the operations for installation in a motor vehicle as they are relatively rigid and require few fixing elements to hold them in position to define a predetermined path within the vehicle body.
  • a chamber for collecting the fuel vapours is associated with these known units, which typically functions as an expansion vessel and an accumulator for the vapours.
  • This chamber which is manufactured separately from the filler pipe unit, must however be attached to the motor vehicle and this necessitates the definition of a zone within the motor vehicle for its anchorage together with associated connection elements, the presence of which means that installation of the fuel supply system takes longer and is generally more labourious.
  • the object of the invention is to provide a unit of the kind defined above, characterised in that it includes a chamber for collecting the fuel vapours located close to the first end of the fuel inlet pipe, and manufactured integrally therewith.
  • the filler pipe unit enables a reduction in the number of components of the fuel supply system, which is advantageous in improving the overall sealing of the system and therefore reducing the emission of vapours into the environment, and which makes installation in the vehicle considerably faster and easier.
  • it enables the optimum use of the material used to make the filler pipe unit, with a consequent reduction in production costs.
  • the reference numeral 1 generally indicates a filler pipe unit for a vehicle, particularly a motor vehicle, which includes a tubular pipe 3 for the introduction of the fuel, and a tubular vent pipe 5 of generally smaller section than the pipe 3.
  • the unit 1 is formed as a single, substantially rigid piece, preferably from a polyamide-based plastics material so as to give the best seal against hydrocarbons and their vapours. Furthermore, the use of such a material makes it particularly suitable to be formed by a blow moulding process.
  • the pipe 3 has a first end 3a to which a connector 7 is joined, for example, by moulding an external connector ring over the end 3a, which connector is provided with a flange intended to be connected to the vehicle body in correspondence with an aperture formed therein, and an opposite end 3b for connection to the fuel tank.
  • the pipes 3 and 5 are disposed side by side and the pipe 5 is connected to the pipe 3 along the generally intermediate portion between the ends 3a, 3b.
  • a structural reinforcing rib 13 is defined between the pipes 3 and 5, starting from this connection portion, which rib is integral with the pipes 3 and 5 and extends towards the end 3b.
  • a projection 15 for fixing the filler pipe unit 1 is advantageously formed integrally on the rib 13.
  • the fuel inlet pipe 3 preferably has an integral, readily flexible bellows portion 9 disposed close to the end 3b to facilitate the connection to the fuel tank, and the vent pipe 5 is provided with an integral expansion chamber 6 close to its end 5b, opposite the end 5a for connection to the pipe 3, which functions to prevent blow back when the fuel is introduced into the pipe 3.
  • the bellows portion 9 and/or the expansion chamber 6 may be formed separately from the pipes 3, 5 and connected subsequently thereto in any known way.
  • a tank 20 for collecting the fuel vapours and which acts as an expansion chamber therefor, formed together with the pipe 3, is located close to the first end 3a of the fuel inlet pipe 3.
  • the tank 20 is supported by another rib 21 functioning as a bracket which extends from the part of the pipe 3 substantially opposite the vent pipe 5, generally at a curved portion of the pipe 3.
  • the top of the tank 20 is provided with an automatic pressure relief valve 23 of known, multifunctional type connected, for example, by a bayonet connection and usually of the type which opens when associated predetermined pressure difference thresholds between the environments upstream and downstream of the valve 23 are exceeded, and which closes when the motor vehicle tilts beyond a predetermined angle.
  • an automatic pressure relief valve 23 of known, multifunctional type connected, for example, by a bayonet connection and usually of the type which opens when associated predetermined pressure difference thresholds between the environments upstream and downstream of the valve 23 are exceeded, and which closes when the motor vehicle tilts beyond a predetermined angle.
  • the valve 23 has a connector spigot 24 with a service tube 25 which enables the vapours collected therein to escape under certain conditions.
  • filler pipe units 1 for installation in motor vehicles which use lead-free petrol or gasoline (a mixture of lead-free petrol and alcohol) as fuel are connected to an anti-evaporation installation of known type which includes an activated carbon trap, also known as a "carbon canister", connected to an intake manifold of the engine, such that the vapours in the tank 20 can be retained in the activated carbon trap for release to the engine on demand, together with air from the external environment.
  • the tank 20 is isolated from the fuel inlet pipe 3 and is provided at its base with a connector 27 for the connection of one or more service tubes 28a, 28b (two such tubes are shown by way of example in the accompanying drawings) for connection with associated safety float valves (not shown) installed on the upper wall of the fuel tank.
  • the tank 20 still has the valve 23 with the associated tubing (see Figure 4) which, in this case, communicates directly with the external environment.
  • the tank 20 also communicates with the pipe 3 by means of a connector pipe 22 which leads into the tank, close to the bottom thereof, and which is preferably formed along the support rib 21.
  • Resiliently deformable tongues 30 are advantageously integrally formed on the outside of the pipe 3 for holding the tube 25 and the tubes 28a, 28b, if present, against a portion of the pipe 3.
  • the filler pipe unit 1 in the associated motor vehicle in that, together with the associated tank 20, it is a single, substantially rigid element and therefore requires only a few connection elements to hold it in the correct position to define a predetermined path within the vehicle body.
  • the bellows portion 9 facilitates its connection with the fuel tank inlet, especially when both the fuel tank and the whole unit 1 are already installed in their respective final positions.
  • This bellows portion is highly deformable which also enables it to absorb dimensional variations in the elements connected to it which may arise when the motor vehicle is in use due mainly to thermal stresses, and to damp vibrations arising when the motor vehicle is in use.
  • a preliminary tubular body is initially extruded, formed from polyamide-based plastics material and possibly containing a small percentage of elastomeric material in order to make the following stage of blow moulding the parison easier.
  • the parison is then disposed in a hollow open mould shaped to define the outer surfaces of the adjacent pipes 3 and 5 with the connection rib 13, and the tank 20 with the associated rib 21 for connection to the pipe 3. Since the tank 20 is disposed at the upper part of the pipe 3 close to the end 3a and at the opposite end to the vent pipe 5, and since the pipe 5 is either absent or of relatively small section in this zone, the tank 20 is advantageously formed by using the material of the parison which is in excess because the diameter of the pipe 5 is small or it is absent. In this way, and by virtue of the presence of the tank 20, the use of the parison material in the zone of the unit 1, close to the end 3a of the pipe 3, is optimised, thereby avoiding wastage of material.
  • the mould is formed so as to be able to form the expansion chamber 6, the bellows portion 9, the attachment projection 15 and the resilient tongues 30 for retaining the service tubing, whenever these elements are to be manufactured integrally with the unit 1.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)

Claims (13)

  1. Einfüllrohreinheit für den Kraftstofftank eines Kraftfahrzeugs, wobei die Einheit ein im Wesentlichen starres Kraftstoff-Einfüllrohr (3), das ein erstes Ende (3a), das mit dem Aufbau des Kraftfahrzeugs verbunden werden kann, und ein zweites Ende (3b) besitzt, das mit dem Kraftstofftank verbunden werden kann, sowie ein Entlüftungsrohr (5) aufweist, das mit dem Kraftstoff-Einfüllrohr (3) gemeinsam ist, mit ihm zwischen dem ersten und dem zweiten Ende (3a, 3b) verbunden ist und auch mit dem Kraftstofftank verbunden werden kann, dadurch gekennzeichnet, dass die Einheit einen Behälter (20) für das Sammeln von Kraftstoffdämpfen aufweist, der in der Nähe des ersten Endes (3a) des Kraftstoff-Einfüllrohrs (3) angeordnet und gemeinsam mit diesem ausgebildet ist.
  2. Einheit gemäß Anspruch 1, dadurch gekennzeichnet, dass der Behälter zum Sammeln von Dämpfen (20) auf dem Kraftstoff-Einfüllrohr (3) auf der Seite gegenüber dem Entlüftungsrohr (5) ausgebildet ist.
  3. Einheit gemäß Anspruch 1 oder Anspruch 2, dadurch gekennzeichnet, dass der Behälter zum Sammeln von Dämpfen (20) mit einem automatischen, multifunktionalen Entspannungsventil (23) versehen ist.
  4. Einheit gemäß Anspruch 3, dadurch gekennzeichnet, dass der Behälter zum Sammeln von Dämpfen (20) vom Kraftstoff-Einfüllrohr (3) getrennt ist.
  5. Einheit gemäß Anspruch 4, dadurch gekennzeichnet, dass der Behälter zu Sammeln von Dämpfen (20) über eine zugeordnete Verrohrung (28a, 28b) mit zumindest einem Sicherheits-Schwimmerventil, das im Kraftstofftank angeordnet ist, sowie über das automatische Druckentspannungsventil (23) mit einem Aktivkohlefänger verbunden ist.
  6. Einheit gemäß Anspruch 3, dadurch gekennzeichnet, dass der Behälter zum Sammeln von Dämpfen (20) mit dem Kraftstoff-Einfüllrohr (3) über ein Verbindungsrohr (22) in Verbindung steht.
  7. Einheit gemäß Anspruch 6, dadurch gekennzeichnet, dass der Behälter zum Sammeln von Dämpfen (20) mit der äußeren Umgebung über das automatische Druckentspannungsventil (23) in Verbindung stehen kann.
  8. Einheit gemäß irgendeinem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass die Einheit aus einem Kunststoff auf Polyamidbasis hergestellt wird.
  9. Einheit gemäß irgendeinem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass eine Verstärkungsrippe (13) zwischen den Rohren (3, 5) ausgebildet und mit diesen gemeinsam ist.
  10. Einheit gemäß Anspruch 9, dadurch gekennzeichnet, dass die Rippe (13) ein integriertes Befestigungselement (15) besitzt.
  11. Einheit gemäß irgendeinem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass das Kraftstoff-Einfüllrohr (3) in der Nähe seines zweiten Endes (3b) mit einem integrierten Balgteil (9) versehen ist, um eine Verbindung mit dem Kraftstofftank herzustellen.
  12. Einheit gemäß irgendeinem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass das Entlüftungsrohr (5) eine integrierte Ausdehnungskammer (6) aufweist.
  13. Einheit gemäß irgendeinem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass das Kraftstoff-Einfüllrohr (3) eine integrierte Halteeinrichtung (30) besitzt, um die Verrohrung (25; 25, 28a, 28b) zu halten, die dem Behälter zum Sammeln von Dämpfen (20) zugeordnet ist.
EP19970112998 1996-07-30 1997-07-29 Kraftstoffeinfüllstutzen-Modul für Kraftfahrzeug Expired - Lifetime EP0822110B1 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
ITTO960661 1996-07-30
IT96TO000661 IT1284714B1 (it) 1996-07-30 1996-07-30 Gruppo di bocchettone del serbatoio del carburante di un veicolo.
US08/997,545 US5996622A (en) 1996-07-30 1997-12-23 Filler pipe unit for the fuel tank of a motor vehicle
CNB981039936A CN1146511C (zh) 1996-07-30 1998-01-15 一种用于机动车辆的燃油箱的加油管装置

Publications (3)

Publication Number Publication Date
EP0822110A2 EP0822110A2 (de) 1998-02-04
EP0822110A3 EP0822110A3 (de) 1999-07-14
EP0822110B1 true EP0822110B1 (de) 2005-02-09

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP19970112998 Expired - Lifetime EP0822110B1 (de) 1996-07-30 1997-07-29 Kraftstoffeinfüllstutzen-Modul für Kraftfahrzeug

Country Status (8)

Country Link
US (1) US5996622A (de)
EP (1) EP0822110B1 (de)
CN (1) CN1146511C (de)
BR (1) BR9604717A (de)
DE (1) DE69732453T2 (de)
ES (1) ES2236769T3 (de)
IT (1) IT1284714B1 (de)
PL (1) PL184312B1 (de)

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Also Published As

Publication number Publication date
ES2236769T3 (es) 2005-07-16
ITTO960661A1 (it) 1998-01-30
DE69732453D1 (de) 2005-03-17
PL184312B1 (pl) 2002-09-30
CN1146511C (zh) 2004-04-21
EP0822110A3 (de) 1999-07-14
CN1223207A (zh) 1999-07-21
PL321338A1 (en) 1998-02-02
EP0822110A2 (de) 1998-02-04
US5996622A (en) 1999-12-07
DE69732453T2 (de) 2006-01-12
IT1284714B1 (it) 1998-05-21
BR9604717A (pt) 1998-06-23

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